Polar spline chart from a URL

Create a Polar spline chart as a PNG image with a single URL — A smoothed line on polar axes. No charting library, no JavaScript, no screenshots.

Live example

https://yakcharts.com/chart.png?type=polar_spline&data=%5b%5b1%2c4%5d%2c%5b2%2c7%5d%2c%5b3%2c3%5d%2c%5b4%2c9%5d%2c%5b5%2c6%5d%5d&title=Polar%20spline%20chart

Embed it anywhere

<img src="https://yakcharts.com/api/chart.png?apiKey=YOUR_KEY&type=polar_spline&data=%5b%5b1%2c4%5d%2c%5b2%2c7%5d%2c%5b3%2c3%5d%2c%5b4%2c9%5d%2c%5b5%2c6%5d%5d">

Works in email, PDFs, READMEs, Slack, dashboards — anywhere an image works. Sign the URL with your secret to remove the watermark.

From code

curl "https://yakcharts.com/api/chart.png?apiKey=YOUR_KEY&type=polar_spline&data=%5b%5b1%2c4%5d%2c%5b2%2c7%5d%2c%5b3%2c3%5d%2c%5b4%2c9%5d%2c%5b5%2c6%5d%5d" -o chart.png

Full reference + JavaScript, Python, PHP, Go and Ruby samples in the docs.

Other chart types

Line chart Sparkline Spline chart Area chart Bar chart Stacked bar chart Percentage bar chart Horizontal bar chart Horizontal stacked bar Funnel chart All examples

Put this chart in your own emails, reports and dashboards

YakCharts turns data into a PNG from a single URL — no charting library, no JavaScript, no screenshots. Free tier included; every plan has all 28 chart types.

Start free Read the docs